{"cve":"CVE-2026-45134","nvd":{"published":"2026-05-27T20:16:38.697","modified":"2026-10-26T11:10:00.157","status":"Awaiting Analysis","description":"LangSmith Client SDKs provide SDK's for interacting with the LangSmith platform. Prior to LangSmith SDK Python 0.8.0 and JS/TS 0.6.0, the LangSmith SDK's prompt pull methods (pull_prompt / pull_prompt_commit in Python, pullPrompt / pullPromptCommit in JS/TS) fetch and deserialize prompt manifests from the LangSmith Hub. These manifests may contain serialized LangChain objects and model configuration that affect runtime behavior. When pulling a public prompt by owner/name identifier, the manifest content is controlled by an external party, but prior versions of the SDK did not distinguish this from pulling a prompt within the caller's own organization. This vulnerability is fixed in LangSmith SDK Python 0.8.0 and JS/TS 0.6.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","score":7.1},"cwes":["CWE-502"],"references":["https://github.com/langchain-ai/langsmith-sdk/security/advisories/GHSA-3644-q5cj-c5c7"],"products":[],"source":"nvd","synced_at":"2026-10-26T11:33:08.859761529+00:00"},"epss":{"cve":"CVE-2026-45134","score":0.00199,"percentile":0.09649,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-3644-q5cj-c5c7","url":"https://osv.dev/vulnerability/GHSA-3644-q5cj-c5c7","summary":"LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning","modified":"2026-09-10T03:51:04.416695616Z","packages":[{"ecosystem":"PyPI","name":"langsmith","purl":"pkg:pypi/langsmith","ranges":["<0.8.0"],"fixed":["0.8.0"]},{"ecosystem":"npm","name":"langsmith","purl":"pkg:npm/langsmith","ranges":["<0.6.0"],"fixed":["0.6.0"]},{"ecosystem":"PyPI","name":"langchain-classic","purl":"pkg:pypi/langchain-classic","ranges":["<1.0.7"],"fixed":["1.0.7"]},{"ecosystem":"PyPI","name":"langchain","purl":"pkg:pypi/langchain","ranges":["<0.3.30"],"fixed":["0.3.30"]}]},{"id":"PYSEC-2026-2555","url":"https://osv.dev/vulnerability/PYSEC-2026-2555","summary":"LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning","modified":"2026-07-13T16:43:39.736848907Z","packages":[{"ecosystem":"PyPI","name":"langchain","purl":"pkg:pypi/langchain","ranges":["<0.3.30"],"fixed":["0.3.30"]}]},{"id":"PYSEC-2026-2560","url":"https://osv.dev/vulnerability/PYSEC-2026-2560","summary":"LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning","modified":"2026-07-13T16:43:39.736848907Z","packages":[{"ecosystem":"PyPI","name":"langchain-classic","purl":"pkg:pypi/langchain-classic","ranges":["<1.0.7"],"fixed":["1.0.7"]}]},{"id":"PYSEC-2026-2582","url":"https://osv.dev/vulnerability/PYSEC-2026-2582","summary":"LangSmith SDK: Public prompt pull deserializes untrusted manifests without trust boundary warning","modified":"2026-07-13T16:43:39.736848907Z","packages":[{"ecosystem":"PyPI","name":"langsmith","purl":"pkg:pypi/langsmith","ranges":["<0.8.0"],"fixed":["0.8.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}